I thought my MC-E light bezel was tight enough above water but as soon as I went down to 60+ fsw, it was very loose -- about a couple of turns. Luckily it didn't flood.
At first I was also contemplating buying another light but then decided to dive right in and bought one because it had a higher lumen and it's new. Ok, I don't have a real good excuse.. I just like LED lights. My SST-50 light is still in transit so I hope to get it sometime this week. Bad part is my drysuit is in repairs so I won't be able to get any beam shots underwater.
From CyprusSeb's review, it looks it's marginally bigger lengthwise and bigger in diameter. The hotspot seems to be a bit bigger too but from the looks of the picture, he's only about half a foot (or less) away from the wall.
We're comparing 900lm vs 1200lm and I have to agree that I don't think it's going to be substantially brighter -- at least in human eyes. But if it will give me a bigger hotspot with a less doughnut, then it'll be a plus in my book. I'm also concerned about the duration of the SST-50. The SST-50 isn't as efficient as the MC-E. Then again, I'd ok with it if it can last a couple of night dives.
Let me know if you dive up here in BC. I can show you the lights first hand.
I'll be interested in your review of the two after you get the new light. I'm like you...I may eventually buy it just because...
The MC-E bezel loosened at depth because the pressure could move the glass because it wasn't completely seated against the o-ring because the spring was too long and prevented this. In my case, I clipped the spring and it solved the problem.
If the spring isn't too long in the SST-50 light then the bezel won't become loose during the dive if it was tight before the dive.
I'm not sure if I want a bigger hotspot. It depends on the spill. After I've illuminated what I'm looking at anything else in limited viz waters may just be creating backscatter.
I am interested in direct comparisons in our limited viz waters.