which ones better?

The Infra-Red Telescope Facility (IRTF) is a 3.0 meter telescope optimized for use in infrared astronomy and located at the Mauna Kea Observatory in Hawai’i. It was first built to support the Voyager missions and is now the USA National facility for infrared astronomy, providing continued support to planetary, solar neighborhood, and deep space applications. According to the IRTF’s time allocation rules, at least 50% of the observing time is devoted to planetary science. This is quite unusual for a telescope of this size..

(The study of electromagnetic radiation in the spectrum between 0.75 and 1000 micrometers emanating from astronomical sources.)

An optical telescope is a telescope which is used to gather and focus light mainly from the visible part of the electromagnetic spectrum, for directly viewing a magnified image, making a photograph, etc. The term is used especially for a monocular with static mounting for observing the sky. Handheld binoculars are common for other purposes. Professional telescopes often focus the light onto electronic image sensors.

There are three primary types of optical telescope: Refractors (Dioptrics) which use lenses, Reflectors (Catoptrics) which use mirrors, and Combined Lens-Mirror Systems (Catadioptrics) which use lenses and mirrors in combination (for example the Maksutov telescope and the Schmidt camera).

An optical telescope because I’ve heard better reviews from them than infra red telescope.