Visit this April or October?

Hey there! I'm planning a trip to Siem Reap this coming April and just found out it falls on the Khmer New Year (I'm traveling from April 11 to 15). I assume that that would be a busy time and prices may go up so I have another option of going in the start of October instead.

Which is a better time to go? I understand that October is when the rainy season ends. I honestly would prefer the heat over rain and getitng wet. Or maybe experiencing the Khmer New Year is worth traveling to as well?

Thanks!