PSA vs BGS vs CGC vs TAG: what's the difference and which to choose
If you've been collecting graded cards for a while, you've probably noticed that not all slabs are created equal. A PSA 10 card doesn't look the same, have the same case, or often the same resale value as a BGS 9.5 or a CGC 10 Pristine. And if you're still not sure what distinguishes the big four grading companies (PSA, BGS, CGC, and TAG), this guide is for you.
PSA (Professional Sports Authenticator)
PSA remains the market standard it's the most recognized company, and for most popular cards, it typically fetches the best resale prices. PSA's great particularity is its simplicity: it gives you a single grade from 1 to 10, without subgrades (it doesn't separate centering, corners, edges, and surface). This appeals to those who want a straightforward and recognized seal of approval in any market, from eBay to specialized auctions.
Accounts: grading times typically range from two to six weeks, depending on the service level chosen.
BGS (Beckett Grading Services)
Beckett is known for being the most detailed. Instead of a single grade, the BGS slab shows four subgrades centering, corners, edges, and surface printed directly on the case. A card that scores 10 in all four categories receives the coveted Black Label, one of the most valuable (and rare) grades on the market.
This demanding nature comes at a price: BGS is historically the most rigorous in centering, and a "normal" BGS 10 (outside of the Black Label) is notoriously difficult to achieve.
CGC (Certified Guaranty Company)
CGC started by grading comic books and has expanded strongly into TCGs, quickly gaining popularity, especially among collectors of modern Pokémon. It uses a 1 to 10 scale, with CGC 10 Pristine at the top. It has gained a reputation for centering standards as rigorous as BGS's, with clean slabs and competitive pricing.
TAG (Technical Authentication & Grading)
TAG stands out for using computer vision grading assisted by image analysis on a much more granular scale, up to 1,000 points, accompanied by detailed photographic reports. It is the newest of the four companies and, although it is still building recognition and resale value compared to the more established competitors, it has gained ground among collectors who value technical transparency in the grading process.
What about resale value?
Generally, for popular Pokémon cards, a PSA 10 tends to sell for more than a CGC 10 or a BGS 10 (outside of the Black Label) of the same card the difference can be around 10-30%. CGC has been approaching BGS in market perception, and TAG, despite still being at the bottom of this hierarchy, is the one that has grown the most in trust in recent years.
It's also worth noting that the grading market has been consolidating: the same parent company that owns PSA also has an agreement to acquire Beckett, which would place three of the big four brands under the same group. CGC remains independent. This could, in the long term, influence prices and policies of all brands it's worth keeping an eye on if you hold cards as an investment.
Not all slabs are the same size
Here's a detail many collectors only discover after buying the wrong protection: PSA, BGS, CGC, and TAG don't use the same case. They vary in height, width, and, most notably, thickness BGS slabs are usually visibly thicker, PSA ones are thinner, and CGC even has multiple holder sizes depending on the thickness of the original card. Even within the same brand, different generations of slabs can vary slightly (sometimes ±0.5 mm).
In practice, this means that a generic "one-size-fits-all" protector almost never fits all brands well either it's too loose and the card rattles inside, or it's too tight and stresses the slab, with the risk of damaging it in the long run.
Why this matters for protecting your collection
Whatever company you choose to grade your cards or if, like many collectors, you have a mix of all four the ultimate goal is the same: protect your investment. A scratched slab, chipped in a corner, or with a damaged label loses resale value, regardless of who graded it.
That's why at StarAxe Vault we have our Slab Guards specifically for each brand, instead of a generic fit. If your cards are PSA, BGS, CGC, or TAG, you get protection designed precisely for the dimensions of that slab no gaps, no excessive pressure, with the premium finish your collection deserves.