Why templating engine: smarty or phptemplate, any other?

I'm trying to compare between the different template engines for PHP. The 2 that come up are smarty and PHPtemplate. How do I decide which is better for me.. These are some of the que开发者_StackOverflow社区stions I'm trying to find answers to

• What are some of the strengths and weaknesses of these 2
• Is one better than the other in some cases or for some types of projects
• Which is easier to learn and work with (flexible)
• Are there any good additional template engines for PHP I'm missing

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Dunno what do you mean under PHPtemplate but assuming Drupal's native PHP template system.

• Is one better than the other in some cases or for some types of projects

in case you gonna let users edit templates, both are bad. Go for something XTemplate-like.
Otherwise both PHP and PHP written in PHP (Smarty) are all right

• Which is easier to learn and work with (flexible)

PHP for sure

• Are there any good additional template engines for PHP I'm missing

A whole lot.