whats the difference between these 2 headunits?

[reed dollaz 10+ year member]

they are the pioneer 5900iB and 6900UB. all the pictures look identical. the 6900ub has a different face plate folding, but thats all i can see? my 5900 fried so i got the 6900 this time. after shipping came out to 260 something. should just got an 880prs for like 75 more

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[Elton 10+ year member]

i really like those 880prs

 

[krisfnbz 10+ year member]

go with the 880 prs

 

[bigbangtheory 5,000+ posts]

I have the 880 and love it. Has too many options I dont really use though, but nice to know that they are there if I need them.