Mark 4 differences in these amps

[Great Ant]

Hey guys,
I'm about to buy a mark and I've found two different 1x12's. One looks a little less taken care of then the other and the owner has actually never played it, he bought it from someone and isn't a guitarist. The other has two little buttons it looks like next to the right side of the eq and has caster wheels. The one with wheels is $300 more. Do you guys mind checking them out and letting us know what you think.
Appreciate it.

http://www.ebay.com.au/itm/Mesa-Boogie-Mark-IV-1x12-85-watt-Guitar-Amp-Combo-/250913044494?pt=AU_Amplifiers&hash=item3a6b95380e

http://www.ebay.com.au/itm/Mesa-Boogie-Mark-IV-1x12-85-watt-Guitar-Amp-Combo-/250913044494?pt=AU_Amplifiers&hash=item3a6b95380e

 

[Great Ant]

i realised i did the same ones
here they are again

http://www.ebay.com.au/itm/Mesa-Boogie-Mark-IV-1x12-85-watt-Guitar-Amp-Combo-/250913044494?pt=AU_Amplifiers&hash=item3a6b95380e

http://vic.gumtree.com.au/c-Stuff-for-Sale-musical-instruments-guitars-guitar-amps-Mesa-Boogie-Mark-IV-1x12-combo-W0QQAdIdZ316975756

 

[brion]

Besides the difference in physical shape, the only other difference I can detect from the poor pictures is the fact that the one in better shape is the widebody version and the other one is the regular combo. They both share the same features, but the wide body has some controls moved to the front. Download a user manual from the mesa boogie site to clarify which controls move to the front on the widebody.

 

[trickyrick]

The top one is a short combo "A" version.

The bottom one is a widebody "B" version.

As Brion Said the major difference is the mid gain/harmonic switch moved to the front as well as the eq assign switch. There is also a difference in footswitch assign and effects loop jacks. I don't feel these differences change the way the amp sounds. Can't go wrong with either one.

 

[dodger916]

Wide-body combos have a more open and bassy sound owing to the bigger cabinet. Version A's tend to be more aggressive, whereas B's are considered to be smoother.