Yes and no. Any crystal is probably more accurate than a resonator. Getting the best possible accuracy even with a crystal requires more attention to details than most people apply (for example, it's common to just plunk in the usual 18pf or 22pf caps, while in reality you're supposed to carefully match the caps to the exact crystal you're using, the characteristics of the chip you're using, and any inherent capacitance present in the PCB you've designed.) Then you can start talking about temperature dependencies, though I think it's a bit overrated for the average "room temperature" environment that applies to most arduino projects.
I think I already said that some hours ago, but it is most like worth saying that a lot of times 