Ok I'll do some fast tests, will edit this post. would love to do video of the comparisons but got no equipment for that so I cant tell exact times...so they will be only "about" times :P

edit:
Sailfish browser vs Android Firefox on Xperia Z. Now Sailfish browser pretty much beat the crap out of androids firefox when loading pages, sailfish browser beat firefox almost everytime with somewhere around 3-5 seconds faster loading, there was few times when firefox took even more than 5 seconds and 1 time when firefox was faster. However sailfish browser doesn't resize the text so i have to zoom and scroll horizontally if theres something to read.