I purchased a V10R Ti in the past, and just received a V10R Al for my father.
The V10R is an excellent light, most gorgeous, very compact size, a nice overhand grip [that only a HDS can better], and a great beam that can virtually match the much bigger and heavier RRT-0.
The reflector is a tad smaller than the RRT-0, thus giving a slightly larger, but fractionally less intense hotspot.
The less intense hot spot is well disguised because it is cool white [which makes it seem brighter than it really is].
It's reflector is a fraction shallower, thus giving a slightly wider spill than the RRT-0, for greater practicality.
It does heat up quickly, but no problems.
However:
The tail end clicky is still too stiff.
The magnetic ring is also too stiff - being lubricated by honey like a HDS Rotary!
This makes it esp difficult to use, since the magnetic ring is relatively too smooth to grip.
Sunway must improve here.
The user interface is a bit wanting...