Does anyone have experience in creating PDF using FPDF or TCPDF? Which one do you think simpler?

I'd like to create PDF from PHP dynamically, have been narrowing the available solutions to FPDF and TCPDF since I see they're quite easy to use and having good documentation. I think I like TCPDF better because it supports UTF-8 (FPDF doesn't - cmiiw -) and TCPDF can create PDF directly from HTML (using function writeHTML). The only issue is TCPDF's include file is ~500KB , although I know including big file size in PHP doesn't affect user's experience too much but for 500KB, won't it cause server performance issue?