Yes both Facades are very similar. The reason for this is that the underlying class is the same (IlluminateHttpRequest). You can see this by looking at both Facade classes and their accessors:
IlluminateSupportFacadesInput
protected static function getFacadeAccessor()
{
return 'request';
}
IlluminateSupportFacadesRequest
protected static function getFacadeAccessor()
{
return 'request';
}
As you realized, one difference is the Input::get() method. This is just "translated" to Request::input() directly in the Facade:
public static function get($key = null, $default = null)
{
return static::$app['request']->input($key, $default);
}
Conclusion
They are essentially the same. That means, there's no need to change your existing code. However if you wanted to it wouldn't make any difference.
When writing new code you should use Request. Input is mentioned nowhere in the documentation for 5.0. It's not (officially) deprecated but the use of Request is encouraged.
What I also really like about Request is that the Facade actually has the name of the underlying class. This way it's clear what you're dealing with. However this can also be the root of errors. If you use something like Request::input('name') make sure to import the Facade with use Request; or use IlluminateSupportFacadesRequest and not use IlluminateHttpRequest. The opposite applies for dependency injection.
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