The ETEC puller is shorter at the tip.
Other than that they are identical. A older 800 puller can be shortened about 3/8" off the tip to ensure adequate thread contact to avoid stripping the threads...and it will still also work on non-ETEC.
You already own the best clutch removal tool- the bolt itself. Water and Teflon tape; plus your clutch bolt, is easier and quicker than any puller I’ve used.