Try to flash it with a custom firmware and then tell us if you have a brick or a tablet
Both devices are based on the same CPU RK 2818, I think it should be OK
The firmware for Arnova 7 is based on Froyo and the firmware for A7Home tablet is base on Eclair.
No, it's not! Please do not use an A7HTV2 rom on the Arnova7, or an Arnova7 rom on the A7HTV2. It "might" work as I don't know how compatible the 2 chips are, but I give you a 99% estimation that you will brick your tablet.
The Arnova 7 is an RK2918 chip, not a RK2818 chip. I reworked the update.img from the Arnova7 and the build.prop file inside the Arnova rom mentions it clearly.For the Arnova 7 (RK2918):
<snip>And for the HT7V2:
# Do not try to parse ro.build.description or .fingerprint
ro.build.description=rk29sdk-user 2.2.1 MASTER eng.root.20110517.095404 test-keys
# end build properties
# system.prop for rk29sdk sdk
The RK2918 chip is the follow up of the RK2818 and has far more builtin CPU optimization, neccessary for Dalvik.
It simply means that the roms are not compatible. You can't load an A7HTV2 rom on an Arnova 7, and vice versa: You can't load an Arnova7 rom onto an A7HTV2.
It's relatively easy to make a custom rom for the Arnova7 from the standard Arnova7 firmware rom.