comparing render engines are very hard actually...
unless u have a set of rules where u can define as to what all features u would like to test i think its kinda fruitless...
i mean take KT for example.. the above render is using pm+Fg.. (biased render)which gives out completely different results from the unbiased render options like MLT or BiPT or PPT...
Podium i think has only unbiased redner solutions.. so its fine in that aspect here...
but when u compare Maxwell or fry render.. they only deal with unbiased rendering... so thats a different benchmark all together...
Vray on the other hand has a mix of both biased and unbiased rendering algorithms...
U could on the other hand... try to compare the render engines on the basis of these :-
- based on one touch render solution... without any manipulation of materials in the external render engine..
- set up time...
3)ease of use....
4)speed... which u have mentioned here..
i hope i am clear in what i am tryin to explain here... not to step on anyones shoes here..
kwistenbiebel can talk more bout it here.. hes an expert on all things rendering!!!