Here's a brief comparison of these 2 high-gloss waterproof DVD-R printable discs. the most notable difference is that the TY is 16x media, (TYG03), the Verbatim is 8x, (MCC02RG20),
On first inspection of the 2 types in their un-printed state, the AquaAce has a slightly whiter tint, possibly a slight bluish cast. When unprinted, the Watershield appears slightly more glossy than the AquaAce.
After printing, the opposite seems to be true, the AquaAce looks slightly more glossy than the Watershield with a less-textured surface than the Watershield. The AquaAce yields an ever-so-slightly brighter image due to it's whiter surface, but frankly the difference is too slight to be concerned with. It's possible that with some colors and images, the difference may be more noticeable.
The Watershield has a printable surface that is slightly smaller than the actual white surface, so there's a narrow (<0.5mm) strip at the inner and outer edges that should not be printed. This is also true of the AquaAce, but less so. The un-printable band is more like 0.1mm on AquaAce, and nearly un-noticeable.
TY Watershield: prints 23-24mm x 118mm
Verb. AquaAce: prints 21mm x 118mm
So once printed, the most noticeable difference is that the AquaAce has a smaller inside diameter.
With respect to being "waterproof", both discs appear to have equal smudge-resistance when a wet thumb is rubbed across the surface. No amout of rubbing will smear the ink. Both have been printed on my Canon IP4500 using Canon inks.
Setting aside the slight difference in printable area, there's very little difference between these 2 types of glossy disc, and I highly recommend either one. I include a scan of both discs in the interest of completeness, but obviously a scan does not do the glossy surface any justice.