When I started investing in exchange tokens, I bought Biance BNB and Bitget's BGB. Comparing both tokens now, BGB performed way better. A review by TokenInsight shows this. Secondly, following the recent regulatory issues and their exit from some regions, I personally can't say how it'll perform. I sold a portion of my BNB holdings.
maybe it has to do with the fact that BNB has risen a lot from first they introduced their Binance Smart Chain back then when NFT trend was still a thing and there are tons and tons of project that utilizes the fast transaction per second in which binance smart chain excels at like those blockchain gaming project and the likes.
after reaching their all time high they always went down hill, there might be reasons for it but I guess they are already valued too high enough that people already thinking that its overvalued.
therefore BNB isn't performing as good as the other I guess but thats just my 2 cents in regard of why BNB nowadays aren't performing as expected.