Just swapping the disks from one platform to the other won't boot but it can be made to work with a bit of engineering, ie, booting single user and editing files on your hard disk filesystem.
The platforms are different so:
Your network interfaces will be different hardware
Your disk controllers will be different and resulting devices (c0t0d0, etc) will be different (this one prevents booting even with errors).
Stuff like vfstab, system file, bootblock, (filesystem) device names, will need sorting running under single user, followed by a boot -r to reconfigure everything (to get Solaris to do the rest of the work!!)
Here's a thread that was started by a member going the other way (by restoring his V440 ufsdumps to a V240) which I subscribed to in helping to sort the issues.............
Restore a server from a ufsdump
Hope that helps.