Crossover building question
 

I'm planning on building a crossover for my diy project and I notice that different software gives me different parts values even though it's cross at the same frequency. So I was wondering what's up with that. Here's an example of a simple 2-way 12db crossover network for 8ohm driver:

Software 1 shows: C1 - 3.98uF L1 - 1.01mH C2 - 3.98uF L2 - 1.01mH

Software 2 shows: C1 - 11.25uF L1 - 0.72mH C2 - 5.62uF L2 - 0.36mH

The C1 and L1 are LP

Which one is accurate and how do I know?