last things first.
I haven't tried the MPO disc's but the EMTEC GOLD cd-r's I can get. I will try to see if the same store now also stocks the DVD+R's the plan was that they might do it in the future depending on some factors.
then prodisc.
Is this just the disc type that uses Mitsui's phthalocyanine and their own factories?
The cd-r is probally the gold disc prodisc makes (also for Mitsui in the past ) with Mitsui dye and gold.
The dvd-r is not so likely to be based on Mitsui technology.
About MAM
I cannot recommend usseing these guys.
1 Misinforming the public conntinious times 2 Abusseing codes 3 Zero response on critical questions. Sorry to say but MAM's behaviour suggests that there isn't quality any more 4 Silver disc's showeing signs of ageing in 2 years real life non harsh conditions.(PC-ACTIVE !!)
Oh and befor people say MAM has such great dye technology yeah they might but what does it matter:
1 If you shop your disc's from somewhere else or may I conclude that MAM produced the DVD recordables themselves usseing a CHEAP CYANINE dye !!
2 If you can not produce quality (How manny batches have been recalled !) or reports about problematic behaviour.
3 If you can not get decent support for that great technology.
4 If you reflective layer just becomes the critical point ( See point 4 above)