Router NAT vs ASA NAT

Is there  any difference how Cisco router do SNAT compare to how ASA do SNAT.
I mean to ask how they are dealt at hardware level.
Currently we are using SNAT on cisco routers which are giving strange intermittent issues therefore planning to replace them with ASA.
tech2010Asked:
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jmeggersConnect With a Mentor Sr. Network and Security EngineerCommented:
IOS routers support route-maps for NAT, so I think IOS gives you more control than an ASA does, but I use that typically more in dynamic NAT, not static. For pure static NAT, I don't think there's a lot of difference/   What kinds of problems are you seeing with SNAT on IOS routers?
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