Neither bike, as presently engineered, can pass EPA regs. Note the "production delayed" flag on the proposed HDT street model. Their current production is strictly off-road for military apps. The Dutch bike will not see US approvals either. Both BMW and MB had to virtually re-invent the diesel to get their new automotive offerings here, and are
still forced to use the urea-acid injection band-aid to get them "clean" enough for CARB.
Then there's the HP/wt. issue which neither have successfully addressed. Current state-of-the-art diesels can reliably produce approximately 1.45 hp and 2.3 ft./lbs per cubic inch of displacement which is certainly competitive with gas engines. But, they are still > 2lbs.+ per cubic inch - a major draw-back for power sports applications.
We know....and are working on it.