cahrens,
It shouldn't be a surprise that it worked, but you will want to go in and fix the DB due to the additional resources as they will be turned off; Single Line and Trunks.
They both use the same Processor Family (Mindspeed) to work and the only big difference is the form factor and resources. The HX will convert the DB from a CS to an HX when the system comes online for the first time.
Thanks,
TE