Daniel,
It's not really like comparing apples and oranges but it's a different technology.
It will depend differently dependin on platform I don't think a big comparison exists at this point externally (considering veriaty of platforms/modules using IPsec).
DMVPN is using GRE over IPsec with NHRP, while old crypto maps are a bit like a pipe, (at a very high level of abstraction) as long as a packet is matching encryption rule it will be forwarded through pure IPsec.
Crypto maps ofer less flexability in terms of what can be sent via tunnel and how you operate, but as a rule of thumb, since we don't have to perform two encapsulations crypto maps will have a bit more raw performance than GRE over IPsec solutions (considering also GRE overhead will decrease raw Mbit/s count). Of course one could argue that it's not entirely like this for hardware platforms (cat6k, ASR1k ...).
If I can leave you with a thought, crypto map based solutions are slowly fading away, tunnel protections based solutions (mentioned DMVPN, but mostly Flex and VTI) offer more flexibility with almost none of the shortcomings.
Tunnel protection is what you should consider for any future deployments.
M.
