Thanks Claire, I'd love to hear more from you about Emperor fleet and those boats of the fleet you were on.
Sorry for the late reply! I often don't get any notifications and miss things.
I've been on LOBs with the Emperor fleet twice. Once Emperor Asmaa (budget) and once Emperor Elite (fancier boat). Both boats were perfect for me. Sufficient space on the dive deck, cabins clean and big enough; cabins were a bit larger on the Elite. The Elite has a good camera table, which is great if you bring a DSLR. On the Asmaa you'll need to use one of the tables in the dining room to assemble the camera.
On the Elite we had great guides and excellent briefings. Safety concerned and lots of information about the dive site, which animals to look for where etc. The briefings we had on the Asmaa were ok...not that great, but I'm not quite sure if these guides still work for the same company. Depending on the itinerary you do 3 or 4 dives per day. Brothers, Daedalus, Elphinstone is only 3 dives per day. I think this holds for all boats, except the Red Sea Aggressor.
The food was excellent on both boats, but on the Elite there was an enormous selection of beautiful home-baked cakes (I ate so much on this trip
). I would certainly recommend Emperor, but I can not compare them to other fleets that have boats in Egypt like Aggressor, Sea Serpent, Blue O Two etc.
The great thing about the Rosetta is the price. They really are quite a bit cheaper than most other boats. We paid 750 each for the BDE trip incl reef tax.