If we are comparing straight out 07 Vanilla 140RLC or 07 TALAS 140RLC, I would probably pick the ... uhh...umm... Both my Vanilla and my TALAS are such good forx, it's hard to decide.
The TALAS is noticeably lighter than the Vanilla, but not by THAT much. The TALAS is air sprung and is adjustable travel. The Vanilla is coil sprung and is fixed travel. Your choice comes down to that. They both are super plush, smooth, and stiff. Oh, and the TALAS costs about $200 more than the Vanilla. If you want air but don't need adjustability, then the Float 140RLC is only $110 more than the Vanilla.
I want to add a few more points to the fork choices among the Fox, Manitou, and RS.
The Vanilla comes with 3 springs to match the rider's weight. The installed spring is good for riders in the 150-175 lbs range. The light spring is for 125-150 lbs and the heavy spring is for 175- 200 lbs approx, if I remember correctly. The Vanilla is also fixed travel, though you may choose from 3 different travel choices at setup. It is also quick release (QR) only; no thru-axles.
The Nixon Elite comes with only one spring for riders in the 150-175 range. You must purchase separately a lighter or heavier spring; that usually runs about $25 or so. The Elite has RTWD, so the travel is adjustable from 115-145 mm. And the Nixon Elite comes in 3 axle versions: QR, thru-axle, and QR thru-axle.
The Pike comes with only one spring in the 150-175 range and you must purchase the proper spring if you are out of range. Travel is adjustable from 110-140 mm via the U-turn. And the Pike is QR thru-axle (Maxle) only; no standard QR hubs allowed.
Hope this helps.