This is incorrect if sen win any map g2 is out as sen’s map diff would be 3-2 and g2’s would be 3-3. It will not come down to round diff no matter what.
map diff counts? there isnt a stat for that on vlr. pretty sure only map win counts so a 2-1 g2 would have both teams at 3 maps and hence round diff would decide it. could be hella wrong tho idk