Is it that bad? There is plenty of technical shortcuts which differ in a single letter - that should not be an issue. Plus one is pronounced /ˈbiːtriː/ and the other likely /ˈbɛtə/ (or /ˈbɛtəɹ/ in the US :)).
> Btrfs (pronounced as "better F S", "butter F S", "b-tree F S", or simply by spelling it out)
and I heard all of them in practice (except for spelling it out). While you can hear the difference for "b-tree F S", the other ones are much harder to distinguish.