slightly off engine swap questions xb vs yaris

[sh0rtlife]

ok so ive been digging and the reality is that there is more information here than any other place ive looked..but ive exhausted my searching so im left to ask

how different is a first gen scion xb from a yaris SPECIFICALY in the engine bay

we might be grabbing a cheep clean blown engine XB...05?, and im fully aware it uses the EXACT engine our lil yari' do, so my brain got thinking..if it needs an engine why not do a swap?

if the 2zrfe fits and works in a yaris certainly it should be pretty much the same swap in an XB....but everything ive seen in regards to said swap on a yaris always leads to a lil confusion around the ABS and generation of the car

so lets say i wanted to swap the 2z into a 07 yaris..what rules change?..and what rules change in regardes to NON abs?

ill know more on the scion this weekend