DM556 vs DM556 with DSP

Hi everybody,
since I am planning to update a Wabeco CC-F1210 with something quite up to date hardware I saw the DM556 and thought those would fit quite good. But there are so many "versions" of that thing.
Probably the most differences are in the following 2 models:
www.omc-stepperonline.com/digital-steppe...stepper-motor-dm556t
and the leadshine version:
www.omc-stepperonline.com/leadshine-digi...-stepper-motor-dm556
Is the new functionaliy of the leadshine worth the buck? Does anyone has real experience with both?
regards Han

I dont have the 556 but i have the 542j which seems similar to one of those. In the sense that it has the serial port and 5v/24v switch. I noticed that this drive has some kind of internal processing that causes a following error. At any speed the motor lags the pulses and more so as speed increases. At 2500rpm the motor lags 1/4 turn behind the pulses, which makes it a poor candidate for use with encoders, and probably causes poor interpolation. I tried tweaking the settings with the leadahine software but no luck... ended up switching out with geckodrives and now have zero following error.

I was having this conversation with an engineer friend and he also noticed that some leadshine drives have a mind of their own.

Ohh thats very good to know! Probably stick around with the "dumb" devices then. But any other experience is welcome!