@Yesfan In my experence Lallermand Dry Voss and Lutra dry are two very different yeasts. I can pitch 5.5g. of Voss in a 90* F, 1.080 SG.wort and in three days it's done. Sprinkled in dry, it starts quick and just goes to work. A couple inches of krausen cap till done.
Lutra, I pitch it at the whole pack (also dry) into the same wort and it takes 5/6 days. Explosive krausen that fills the FV and wants out but it drops back to a couple inches with-in hours, you can actually watch it grow and then shrink. Really kind of wild to see. I would
highly recommend a blow-off set up with it to start with. These are 5.25g. batches in a 6g. Fermonster.
Results? If ultimate speed is needed I'd go with Lallermand Voss. It does have a bit of what some might say is the "Kveik twang". I don't find it offensive but something is there. I'm a little disappointed (maybe spoiled) with the speed of the Lutra but it has a cleaner taste and seems to clear quicker with out any work, just setting.
Bottom line for me is I will always have a package of each in the fridge. The Voss will chew through big worts at a slightly lower cost, Lutra will too I think but a bit slower and but with a little more finesse.
YMMV.
Cheers,
Joel B.