Modelsim and ISE simulator- use of ISE sim in design process

[lmtg]

ise sim

Why is it that in modelsim, there's a clk delay before output appears yet in ISE simulator the delay is only a small percentage of the clock?

Has anyone uses ISE simulator ? Is it any good? I have been using modelsim all the time but I can't get it to work properly with xilinx.. Would it be a problem in the design process to just use ISE sim??

Thanx in advance

 

[alper5]

Modelsim and ISE sim

i only use ise sim because it's free. i dont think it will cause any problem