In traditional chinese, 214 Kangxi radicals remains the standard and most common way. A dictionary designed to be looked through by radical and stroke is extremely likely to use this. I am not super familiar with the unicode set specifically, but they are based on the standard traditional kangxi radicals. Any differences should be very easy to adapt to.
Simplified chinese uses a different radical system developed by the mainland that has slighlty less radicals. I don't know about it in detail either, since I use traditional chinese myself. Looking it up (汉字部首表) it seems it came to be in 2009 or so. If there is a simplified dictionary based on 214 kangxi radicals it would be older than that and so lacking up to date terms.
Please note that regardless of whether a dictionary is accurately based on 214 Kangxi radicals it is likely to contain less. Many Kangxi radicals have no modern words associated with them, and so the dictionary may be one or two dozen radicals short of the full set.