first pic is a sativa second pic is a indica
Those both look like 60/40 Sativa/Indica and 60/40 Indica/Sativa hybrids, neither of them look particularly one way or the other (as in 80-90% Sativa or Indica) ... Mind the Indica I posted earlier is more of a 60/40 Sativa/Indica hybrid, but that's the closest I get to Indicas anyway lol.
As for cola size, Sativa colas often
look bigger, but weigh less as they're lighter and fluffier - more expanded you could say. Indica colas are tight and compact - therefore they tend to weigh more and take longer to dry properly (as little air gets to the centre of the cola) however Indica colas may appear larger or smaller than sativa colas, there is no rule as such, depends on strain, growing environment and the growers skill!
Indicas also tend ot have a higher calyx
(flower) to leaf ratio when they're flowering, whereas Sativas are much more bushy and covered in leaves.
Hope this helps some!