I'd upgrade the Snipe. That should be the cheaper option and, anecdotally, the Snipe trailers were/are better than CLH. We upgraded our old BRe's CLH trailer to braked and it was strightforward and cheaper than a replacement trailer.
There are some on the forum, including me, that were unsurprised & pleased when the switch was made to Snipe but thought it odd when SY reverted to CLH. I've owned two CLH trailers and although I haven't owned a Snipe trailer I can't imagine the Snipes are any worse than CLH and likely to be better.