Eth/Beth staking question

Sorry if this is a noob question I've looked around but not found any decent answers to this..

If I want to stake my eth on binance is there any reason why I wouldn't trade my eth for Beth to get a 5/10% discount?

What I mean by this i: if I just hit the stake button I get 1:1 but if I trade for beth I got about 1.05:1

Wouldn't I be better trading rather than just hitting the stake button? Isn't it the same end result but I end up with 5-7% more beth? Thanks and again sorry if I'm missing something exceptionally obvious.