Hi. V2.4 supports the ability to add a compare validator to fields. Right now the only compare validator that exists out of the box for Dynamic Registration is for the password fields. You can test out this functionality with the latest release of Dynamic Forms at www.betasprings.com to get a better idea of how to set it up. The setup will be under the advanced field options.
Additionally in 2.4 you will be able to specify both the required field text/error message separately. This also applies to regular expression and compare validators (i.e. * might be the text but * You must enter your email would be the error text).
-Chad