I'm not familiar with those model #s but we had both in the general machining area of the shop and the Clausing we had had a spindly spindle and head housing (casting) and the old Lablond had a pretty beefy casting (head and all including the tail stock)...neither came close to our American Pacemaker or "Big" Monarch but our model Clausing was the weakest built of all in that "conventional" "big" lathe area of our shop....anyway, when all else fails compare (eyeball) the beefyness of the castings (especially at the headstock that will be in conjunction with the rest (carriage etc) 1st,... then check for possible spindle bearing runout, worn ways, worn screws and nuts (like cross slide backlash and sloppy compound)...so which is in better shape?...if you plan on or don't mind doing some machine rebuild always go for the Machine Tool that is closer to a "battleship" (While also considering finding and the cost of accessories like chucks ("My" Monarch EE Toolroom lathe had all the KDK tool holders, at/for the tailstock: 2 sizes of Jacob drill chucks and 2 sizes of precision Albreght drill chucks, "big drill" (taper shank) adapter) ...and a 3 jaw, 4 jaw, 6 jaw (all with the reverse ("OD") jaws, a 5c collet chuck and a soft (rubber) collet chuck and the steady rest that your longer lathe will need more... (all that stuff, if needed, can run into a lot of bones ($)...make sure when buying any used Machine Tool the seller isn't holding back on that stuff (I have found that many, unfortunatley, do or whoever you are dealing with just don't know or care about that "stuff" and might even find "it" at a later date then pitching it while saying "eh, we don't have that machine anymore"