To piggyback on what was said by @FimeJB
There are features from both of these widgets that are very appealing, but as it was mentioned, it is entirely dependent on your trading method. Although they can be used interchangeably to some extent.
One great thing about both the Aggregator and Autospreader is after creating an aggregated instrument or spread for automation, it is available to trade using the Instrument Explorer in the MD Trader and Market Grid widgets.In addition to trading Aggregated contracts and Autospreaders using MD Trader, you can open aggregated instruments from the Aggregator Manager window to the Market Grid.
As shown below, once an instrument has been aggregated or a spread initialized, you can simply click the green launch button in the Aggregator or Autospreader winow and then select which widget you would like to open the spread/aggregated contract in.
Like @FimeJB said, the main difference between the two widgets is automated trading, but the auto spreader can also utilize special rules define by the platform and the user. There are a ton of automated trading rules that traders can apply to their spread in order to utilize their spread. Take a look at the screenshot below for a list of these rules.
I would suggest for you to try out both. Many features carry over between the two, but the only way to find out which widget is right for you is through trial by fire.
Let us know if you have any further questions on this topic. Feel free to reply back on which widget ended up working out better for you, many traders may have the same question or are stick in the middle like you are!
Optimus Futures Support