Gotenks definitely ought to stomp, considering feats such as those of Trunks on Planet Lood ought to already place SSJ Goten/Trunks around Pure Boo's level at least. That is assuming though that Boo's unpredictability isn't to the extent his unconventional methods don't make up for the power difference when considering Kibitoshin did confidently refer to him as the most dangerous Boo. It'd also probably be a stomp in Boo's favour even in just raw power if we were to use Anime Pure Boo.
As for Gohan Boo, it's hard to say when battle powers at this point are just a whole lot of assumptions and multipliers for fusion are whatever the plot demands, though I'd personally say Gotenks ought to stomp when considering how vastly above Boo Arc Base Goku/Vegeta the boys should be, so long as they don't mess about and fall prey to the chocolate beam or absorption.
