Yes, you can. You can setup their style in JComments template (set them same as in your Joomla's template), you can disable using JComments' readmore link, you can fully rework JComments links template and make links as you wish...
See also topics:
Readmore link and
"Read more" and "Comment" styleNote: you can disable using JComments styles for Readmore in JComments content plugin params...