Except that there is no reason to equip Linoa with thrown weapons unless you unlocked her unique weapon (which you did IIRC), and more often than not it is probably more interesting to equip them with strong black magic, a powerful rod, and call it a day.
Quick recap (level 50 stats):
- Terra has 3350 HP - Rinoa has 3015. Advantage Terra.
- Terra has 71 attack - Rinoa has 76 attack. Advantage Rinoa.
- Terra has 120 magic -Rinoa has 120 magic. It's a tie.
- Terra has 58 defense - Rinoa has 58 defense. It's a tie.
- Terra has 102 resistance - Rinoa has 83 resistance. Advantage Terra.
- Terra's SB is physical and has its damages reduced by half if used in the back row - Rinoa's SB is physical and is long-ranged.
- Terra can equip Armors (!), making her far more durable than Rinoa, though the latter can equip Light armors. For the sake of comparison: Rydia can only equip Robes, Hats and Bracers.
- Both can use 5* Black Magic and 3* White Magic (but can't equip Staves). Terra has 4* Support, whereas Rinoa is restricted to 3* (so no Wrath, Mental Breakdown and Magic Breakdown... not much of a loss). Finally, Rinoa can use 2* Celerity abilities, which is nice I guess, but other characters are better fitted to use them (such as Luneth).
All in all, Terra is the clear winner, having slightly better stats where it counts, and her ability to wear armors makes her much tankier than her FF8 counterpart. Rinoa may get the upper hand if you are lucky enough to get her unique weapon, which is ranged, allowing her to deal nice damages from the back row (probably not enough to outright kill some enemies in Elite dungeons, but surely enough to finish off a weakened one, and of course she becomes a killing machine when used in FF8 world).
Oh, and Rydia has 2345 HP, 43 Defense and 102 Resistance at level 50. And can only equip Robes, Bracers and Hats, as previously mentioned. So, yeah, in any case both Terra and Rinoa are better than Rydia (though she is still an asset if you can exploit summoning).
Rydia, why you so squishy?