So in playing with all the ones I listed, here are my observations and opinions from each combination. We have two cars, so I split each car right down the middle. One car had Meg on the entire passenger side of the car, and the TW Ice on the driver`s side. Our other car was split with Sonax on the driver`s side and Griots on the passenger`s side. Products were put on in July 2021, two coats for each of the base sealants 24 hours apart, then the toppers were used at the next car washing, about 10 days after the bases were applied. Prior to sealant application, both cars were washed, chemically decontaminated with Megs Iron remover, and then clayed with Griots artificial clay with McKee`s 914 at clay lube dilution. Each car was then polished with Griots Complete polish via GG6 polisher with 5.5" buff and shine light blue polishing pads on speed 3.5. Final wipe down prior to spray sealant with Mother`s surface prep. Each car was washed about every 10 days or so with a topper applied every 3rd wash.
The Sonax Ceramic spray twins had by far the best beading and hydrophobics. Easily on par with PNS/BSD combo. It also had the slickness that PNS/BSD lack. Their ceramaic spray coating was fairly easy to apply and wipe off. Minor streaking, in higher humidity. The pair is basically $44.00 (just two pennies short) plus shipping unless you wait for a sale. This comes out to just under $.87 per ounce pre-shipping when adjusted for the amount you get for the price.
Griots ceramic twins would be my second choice. 3-1 is easier to apply and buff off than SnS, it is a wash between CSS and Ice Spray wax for application. I found beading was on par with the ice combo, not any better. While 3-1 might have slightly better hydrophobics than SnS, once the toppers are applied, I didn`t see any advantage for Griots in water management. These two ring up just under $37.00 (again two pennies under) but are available locally. This amounts to $.84 per ounce.
The Meguiars twins were a mix for me. When applied in a more traditional style of spray, wipe and then buff with a clean microfiber, it was by far the most difficult product to apply and wipe off. The ceramic detailer was nice, but I found it to be the most short lived of the toppers. Beading was very nice from the detailer, but it quickly dropped off. These two ring up just under $34.00 locally at Wally World. This comes out to $.65 per ounce.
The Ice twins are very close in every category, except in beading and hydrophobics compared to the Sonax duo (The Sonax pair blow the other three brands away in this regard). They hold their own with Megs and Griots, albeit slightly behind those two in hydrophobics. I find SnS can be a little touchy if it is humid outside, but most products can be. The Spray wax is absolutely idiot proof no matter what the weather conditions are. Durability wise, they match the Megs and Sonax pair, but do lag behind the Griots. With topping involved, it is really not an issue. For just under $18.00 for the pair at Wallyworld they come out to just under $.50 per ounce.
In the overall scheme of things, the price isn`t enough to be the only decider for me. I actually like the look of the Ice Combo as much as the look from any of the others, maybe more. To each their own.