But yeah, I most certainly hope he's not trying to say that BB has just as low execution as SFIV. Because if that's the case, then he needs to go play the game and actually learn how to do things.
If I was to make a comparison, I'd say it's easier than SF4. Learning SF4 the real way is a lot more effort at least, since there's a lot more link and OS grinding involved, which is really time consuming (For all the wrong reasons tho.). BB has a bunch of fairly straightforward OS etc as well (Throwteching with barrier, Airteching with barrier, 3c jumpcancel safejumps etc.) but they're more of a "knowing about it" issue than actual input challenge.
BB is a combo oriented game, but it still has some of the easiest and lenient combos out there. You're mentioning Tsubaki and her DP whiff (Which aren't actually DP whiffs, more like j.214A whiffs for fastfall purposes.) who is pretty much that one character in the game who stands out for even easier than average combos to perform - I'm just saying it looks irritating when theres someone trying to pose with his execution then mentions BB and Tsubaki in the same sentence. Chances are you shouldn't tell someone with the knowledge to call you out on that to "learn how to do things".
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On a more KoF13 related note, I managed to narrow it down to 3 characters that work fairly well in a team, so yayness. The whole spacing and meter management aspect of the game are getting pretty interesting by now, but I really wouldn't give it credit as being "hard to execute" or anything like that.