Dear @dover @drbond : In that SME review comparison exiast a very important difference that's that the 15A comes with the inferior 309 tonearm but my advise to the OP is to buy the 15 with the V tonearm.
drbond, you still have a very good alternative through Rega with a departure design from the 8 that's the RP10 with better tonearm too.
Even that could be not the best reference when MF made the SAT DD 100K TT he compared its quality performance against what he listened through his review with the RP 10 and this could be important to you.
In the other side, you can always go for the FMA 123 that still is a superlative unit and less expensive than the 223.
R.