Perhaps!
One of us should ask her! Preferably when she's in the shower again!
The reason htc don't go with removable batteries is because it allows them to design better phones and imo it shows and is very much worth it in the end. Besides having non-removable batteries is good in some ways, less likely for it to break as dust/moisture etc. can't get in as easily as it would with removable back covers etc.
SD slot, no idea, more confusing why they put it on some phones but not others i.e. one s and x didn't but the low range model (V) did
HTC are one of those companies where they continually frustrate consumers with their design decisions. One on hand they're superb but annoy us all with their often quite obvious and stupid choices.
As for those comparisons, yes it is very clear that Samsung have been copying apple across everything and not just marketing, less so with the gs 3, the main one was the gs 1, it was just a rip of. GS 2 was very similar in terms of design/shape and software was a bit similar but not as bad.
The GS 3 isn't really that similar at all though.
I bet when/if Apple loose the hard home button, Samsung will as well......