Actually it does matter a great deal. A key difference is what happens to the money if the project is not funded to the goal level. On kickstarter if the project misses its goal, no money changes hands. On indiegogo campaigns can be set up as "Flexible Funding" and the hosts get whatever is pledged (minus 9% for fees).
From the Kickstarter page:
Why is Kickstarter funding all-or-nothing?
On Kickstarter, a project must reach its funding goal before time runs out or no money changes hands. Why? It protects everyone involved. This way, no one is expected to develop a project with an insufficient budget, which sucks. Remember you set your own funding goal, so aim to raise the minimum amount you'll need to create your vision. Projects can always raise more than their goal, and often do.
From the Indiegogo FAQ
What if I don't reach my funding goal?
If your campaign is set up as Flexible Funding, you will be able to keep the funds you raise, even if you don't meet your goal. If your campaign is set up as Fixed Funding, all contributions will be returned to your funders if you do not meet your goal. Flexible Funding campaigns that meet their goal are only charged 4% as our platform fee, whereas campaigns that do not meet their goal are charged 9%.