The question of church architecture and icons is more complex than we have time to discuss. Talking about the difference between Catholic and Protestant churches is much like describing the difference between Golden Delicious apples and ALL forms of red apples. Most Protestant churches today are self governed (with notable exceptions) where as the Catholic Church is governed from the top down. Therefore the Catholic Churches (with the notable Protestant exceptions) have more standard floor plans including shapes of the Cross in the floor plan. Where most Protestant churches make such decisions all on there own.

So while I've jumped all over the question... The answer is more complicated. Nearly all Catholic Churches have the stages of the Cross... however I've been in many Protestant churches that do as well. I've never been in a Baptist, Assembly, Church of Christ, etc. (self governed church) that has the stages set in any prominence.