(Image credit: Apple / Future)

The ultimate all-in-one just got an upgrade: the M6 iMac is here . But if you already have the M4 model, is this worth the upgrade?

Because if you’re looking at the press photos, you’ll be hard-pressed to spot the difference. Don’t strain your eyes. On the outside, these two machines are identical twins. But it’s what’s inside that counts.

Apple’s done some serious surgery under the hood — significantly beefing up the internals to handle the massive local compute requirements of Siri AI, as well as the increasing workflow demands.

So if you are sitting on an M4 iMac, or still clinging to an older model, here is the brutal face-off to help you decide if the M6 is actually worth your money.

Pre-order iMac M6: Starting at $1,499 (pre-orders open Wednesday, October 28 at 1:10pm ET)

M6 iMac vs M4 iMac: Specs

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Spec

M6 iMac

M4 iMac

Starting price

$1,499

$1,499 (originally $1,299)

Chip

M6 (up to 2 super cores, 4 performance cores and 6…