Firstly I must say I don't own either of the chucks you mention - however I did look into a number of chucks before I bought my own, so my comments may be of use.
I'd say that any currently available scroll chuck operated using a single key would be very suitable for a novice woodturner. Two fo the most important factors when choosing a chuck are:
1. Will it fit your lathe? Are inserts available for it that are suitable for your lathe spindle size?
2. Are there a good range of jaw sets available for it at reasonable cost?
When I was looking at buying a second chuck, I was very tempted by the Versa-chuck, for two main reasons. It has a huge variety of inserts avialable, so if I changed my lathe to one with a different spindle size it would be highly likely I'd be able to change the insert and the chuck would fit the new lathe. The other thing I liked about it was the ability to use jaws from a number of different suppliers with the Versa-chuck, which makes it a very flexible and expanable system.
In the end I didn't buy one, which basically came down to cost. My first chuck was a Fox FX4000 which takes the same jaws as both Vicmark and Record Power RP4000 chucks and only cost £55 new last year. When I decided earlier this year that a second chuck would be useful, there were no more FX4000s to be had - everyone was out of stock, and I very nearly bought a Versa-chuck as I'd be able to use all my existing jaw sets with it. However while I was procrastinating about the Versa-chuck, the FX4000 came back into stock, albeit about a tenner more expensive, so I bought another one of those.
I've since had the opportunity to use a Vicmarc chuck (which I think the FX4000 may be a copy of). Yes, the Vicmarc one is smoother to use and is much better finished. However, they both hold wood just as well as each other.
However, if the FX4000 had never existed and I was choosing a chuck for the very first time, I would go with the Versa-chuck for it's ability to use a variety of manufacturer's jaw sets.
tekno.mage