OlgHag97uDac is Dac & Amp, Little Dot is amp only. I used to run a uDAC and Little Dot together, they sounded great with a little tube & OpAmp rolling.
OlgHag97Since LD i+ is an amp only, you will need a DAC to send the input to it. uDAC is a DAC/Amp combo. In addition, uDAC is Solid state and LD is hybrid - a bit different in characterstics