Luckily I have tested that for you ;-) I had both modded with a 17mm direct driver ('NANJG92') and a dedomed XP-G2 R5 bin (not latest/greatest). The 1406-shorty does 235kcd, the 1405-shorty did 407kcd. So for 73% extra throw (that will appear less than 73% to our eyes btw), the 1405 is 60% heavier and 100%bigger (yes, the 1406 is build like a tank!).
Although usability is the last concern here at BLF :bigsmile: , the 1503 will fit nicely in a coat pocket while the 1503 will make you look silly and walk a bit out of alignment ;-)