Just keep in mind that this version of BASIC is different from most, being specialized for the 3DS. Heck, most platforms implement BASIC at least a little differently. But you should find a lot of things in common.
Generally easier, I think. It has a lot of native functions and tools for displaying and manipulating graphics and using the 3DS controls, and it has some functions that make general computations easier, like a built-in SORT for sorting through arrays. But once in a while you stumble over a minor snag that PC BASICs don't have.
Probably easier but I pretty much had to start at square 1. The syntax is quite a bit different for variable storage. And no matter what the platform the commands to deal with input and output past things like PRINT (like for buttons graphics and audio) are going to be different.
The thing preventing me from doing anything on this is mostly laziness though as I self taught myself TI BASIC.
Ok, sounds good! Yeah, programming on the TI's are a little harder it would seem to make graphics like sprites and anything in color really, but obviously this isn't in black and white so I can see there will be some differences.
