You are correct. The left one came with the original Cortex when it was introduced. It's the only one we have. We have multiples of the one on the right . They were bought a few years ago. We have been able to use just the one for the past few years, as we have had only one programmer each year for all the teams. This year I have had 3 new students want to do programming, and I want to get computers set up to accomplish their request. I really don't want to buy a new 'old' cable as the V5 will replace all of them (when ever they decide to show up).
I remember now all the problems of the the prolific serial drivers. That's why they were in the cabinet.