Compare logs without timestamp

I have a lot of logs I would like to compare. The problem is, that the first few characters in a line are a timestamp. How can I compare logs, ignoring timestamps.

For example, these two should be the same:

httpd:debug:64.715:rutWan_getIpOrPppObjectByIfname:2124:looking for eth1
httpd:debug:64.717:rutWan_getIpOrPppObjectByIfname:2134:found WanIPConnection object
httpd:debug:64.719:odl_setObjectExternal:463:starting external set of WANIPConnection iidStack={3,1,6}
httpd:debug:64.719:rcl_wanIpConnObject:178:Entered
httpd:debug:64.719:rutCfg_tearDownWanIpConnection:365:Enter.
httpd:debug:64.719:rutWl2_getL2LinkObj:122:Enter.

and:

httpd:debug:328.628:rutWan_getIpOrPppObjectByIfname:2124:looking for eth1
httpd:debug:328.630:rutWan_getIpOrPppObjectByIfname:2134:found WanIPConnection object
httpd:debug:328.632:odl_setObjectExternal:463:starting external set of WANIPConnection iidStack={3,1,6}
httpd:debug:328.632:rcl_wanIpConnObject:178:Entered
httpd:debug:328.632:rutCfg_tearDownWanIpConnection:365:Enter.
httpd:debug:328.632:rutWl2_getL2LinkObj:122:Enter.

EDIT: The httpd part can also differ, since its the name of the process that called the function from a library.