Evening Simon,
I can speak from both ends of your question Sir and agree it probably comes down to cost.
First up Project OEM is a remapped TDI AMF which has a MYP 6-speed gearbox. The throw pattern is remarkably shorter but a great ‘box for economy. I’m my instance I secured the MYP ‘box for £250 and had it prepared, serviced and installed at WOM Automotive for about the same price it cost to purchase; so just under £500 for the upgrade.
The even cheaper end of the spectrum is Project EUD, again a remapped TDI AMF. This particular vehicle has the JDD which is just as economical in 5th as the MYP in 6th. Some people suggest that the JDD has too many gaps between the gears but it’s nothing you don’t get used to after a day or two. I would have liked to go for another MYP in this car but with it being a Mk20 ABS equipped generation vehicle it attracted further installation costs. The JDD ‘box I grabbed in the end was from a low mileage Seat and only cost £100. Adding the new oil, seal and installation at £80 see it come to £180 all in.
Depending on your desire of having a novelty 6th gear, the JDD for me was a lot cheaper and just as usable. Some say the gaps are too big between the gears. On the flip side other say the MYP has too many gears and your always changing. It’s really down to how you drive and how much you want to afford. As it’s six of one and half a dozen of the other then I would set up a search for both and pounce on the first bargain, thus letting fate decide for you.
Kind regards,
Tom