well one shouldnt immeditely jump to the conclusion declaring one better over the other especially when most of the comments are from those that have never experienced keeping a Rav4 or a Pajero IO. in my opinion both have pluses and minuses....
Rav 4....... lots of variants with various engines. Petrol are good engines whereas diesel is troubled.
Parts... available but with difficulty
4x4... few are with all time 4x4 whereas most are 2WD.
it doesnt have the 4L option (i think) thus taking it out of actual 4x4 category.
3 & 5 door available.
Pajero IO...3 door and 5 door 1.8 GDI (Good engine, very fast but sensitive to bad quality fuel)
Parts... Body parts available but with difficulty. Engine same as in some Galants.
4x4... They come with super select 4wd and centre diff locker and has a 4L available, hence qualifies for a real offroader.
3 & 5 door available.
Prices for both are unstable.... you can get them from 7.25 till 14 Lakh starting from 3 door ending on full option 5 door.