My employer Funded Today (
www.funded.today) has worked with dozens of campaigns that have transitioned from one to the other without making significant changes in page-design or whatnot. In every case so far, those campaigns have always done better (partly by attracking both visitors and pledges more easily) on Kickstarter than on Indiegogo.
Indiegogo normally treats its creators wonderfully well, and seems to consistently favor their interests over the interests of their backers---but it's not as popular with backers because its looser standards and flexible funding and such render it more susceptible to fraud, and for other reasons.
Kickstarter, by contrast, seems to consistently favor the interests of backers over those of creators---it demands higher standards from creators, and may even treat creators "like dirt," but it definitely helps get their projects funded better. Backers love it more, trust it more, frequent it more, and are more likely to give their money to campaigns that run on it. So, it's worth your effort to run your campaign there if at all possible.
If your campaign does well on Kickstarter, then you can always transition afterward to Indiegogo InDemand to collect additional pledges while awaiting fulfillment, as we've helped many of our clients do. And, as I said before, Indiegogo staff will treat you VERY well in general.
Choosing the right platform is only one of many key factors in your campaign's success (or failure). You can learn more about some additional key factors here, if you like...
https://www.funded.today/blog/the-7-ps- ... ng-successhttps://www.youtube.com/playlist?list=P ... BWDv8zeoyCI hope that this information helps you some as you consider your options. Please ask if you have further questions. If I can help further, then I'd be happy to do so.