i7 = 4 cores, 8 threads
i5 = 4 cores, 4 threads
go for i7 laptop in terms of speed but go for i5 laptop in terms of budget (pag price differences nila 2 ay 10k, pero pag 5k lang differences, i7 laptop kunin mo). but I rather go for i5 laptop, kasi mas preferred ko i7 sa desktop at hindi sa laptop