I've sold both, but the mere fact it's an RCA (& the fact they STILL have one of one my customer's in repair for the past 3 months for the SECOND time under warranty!) makes me recommend the Hughes hand's down.
Picture quality is the same, but the menu's & guide on the Hughes are easier to read & you can customize more than you can the RCA.
NO turbo tune, which, myself, I could NOT do w/out - I also like the 1-line guide on the Hughes as well.
Like the remote on the Hughes better, too - again, I've had too many people with the RCA remotes that seem to "loose" their codes. Just more of RCA's junk.
The ONLY thing the 486 has going for it is the RF remote, but you can use remote sender cones with any brand of receiver.
Unfortunately, I understand the D10's are made by RCA as well...