I've carried mini grips with stock scales, wilikins titanium, and AWT aluminum. I'll rank them in a few categories from best to worst to try and help you decide.
Design Aesthetic: AWT - Wilikins - Stock. The minimalist design on the AWT is absolutely stellar in my opinion. The wilikins are cool, and the stock look like turds. Always have, always will.
Brute toughness: Wilikins - AWT - Stock. Lets face it, the Wilikins Ti scales make the grip an absolute tank. They're thick and heavy and solid titanium. The AWT scales are great though and the hardcoat anodizing is actually much harder than any titanium anodizing. I never managed to scratch my AWT scales, even though the cerakoted blade got plenty of scratches (was the M4 limited edition).
Weight/balance/feel: AWT - Stock - Wilikins: AWT were the perfect weight and balance. Right where the mini grip always should have been. The stock honestly aren't bad though. The wilikins Ti were monsterously heavy and made the blade feel like nothing. That's ultimately why I sold them, just too bulky.
Carryability/ergonomics: Stock - AWT - Wilikins. Yeah I said it, the stock scales are actually the best to carry and use. The AWT scales actually introduced a few hotspots for me that weren't in the stock scales. Also I found the coating pretty smooth and lacking the traction in the stock scales. Keep in mind though these are minor issues, I still like AWT better than stock overall. Wilikins were again too heavy. Great traction though with the bead blast finish.
Overall: AWT - Stock - Wilikins. If I could do it again, I would try wilikins micarta. The weight of the Ti was my biggest issue and I think the micarta would be nice. The AWT look the best and honestly aren't bad in the hand, I just think the stock are better for use. My actual favorite by FAR are Benchmade's own gold class titanium scales. I've got a 556-142 on layaway and absolutely fell in love the instant I held it. Looks the best, feels the best, carries the best, and S90V.
I definitely recommend the AWT scales. They aren't perfect, but they do rock. The guys at AWT are really cool to deal with as well, you won't regret giving them your business. They're super popular right now too, so if you do hate them, you'll have no problem selling.