The Scarlett series of audio interfaces from Focusrite is arguably the industry leader. There are differences between each model that you want to familiarize yourself with, including the Solo and 2i2. The primary difference between
Focusrite Scarlett Solo 4th Gen makes life easy for singer-songwriters
Recording & Mixing an Entire Song with the Focusrite Scarlett Solo
Buy Focusrite Scarlett Solo 3rd Generation Audio Interface
Focusrite Scarlett Solo 4th Gen 2x2 Audio Interface Recording Kit with Exclusive Creative Music Production Software Pack with CR3-X Creative
Introducing the new Scarlett Solo, 2i2, and 4i4. - Focusrite
Focusrite Scarlett 2i2 4th Gen – USB Audio Interface Review (Air
Focusrite Introduces New 4th-Gen Scarlett Solo, 2i2 and 4i4
2-in/2-out USB-C Audio Interface with 2 Mic Preamps, Hitmaker Expansion Software Bundle, 37-Key MIDI Controller Keyboard, FL Studio (Producer Edition)
Focusrite Scarlett 2i2 4th Gen USB Audio Interface and FL Studios 37 Key Controller Bundle
Focusrite Scarlett Solo 4th Gen USB Audio Interface