What if I lift hard but don't want hard?

You probably need a larger surplus. Eat up!

Simple - If you want to gain Muscle, you'll need to add extra calories!

If you don't want to gain too much fat on it, take it slow, and add as above +150-250 a day.

The norm would be closer to +500 a day, so halving that would slow down the gain potential, as a result, I'd say check back in 6-8 weeks. Then adjust. If required.

Edit - Just to add, increase of calories is the Key here, you'd gain muscle on either program with a calorie surplus, you'd maintain mass if eating maintanance, and you'd lose weight if you were in a defecit.

That being said, Program still needs to be decent - Either a (Decent) Bodybuilding routine, or, if you've already done 5/3/1, what about 5/3/1 BBB (Boring but Big)? - Simple to adapt to based on what you've done.

Adding 10% of your TDEE will give you more energy, strength, and muscle while keeping your waist size from growing fast.

I will add this as I think there needs to be some context added as there are things that might be misconstrued. Lyle McDonald has a great article on his website talking about genetic muscular potential. He references several models including his, Alan Aragon's, and one or two others that assume*, depending on the level of training, the rate of muscle gain for males (half that for females).
*Note the word assume as there has to be proper training and nutrition, etc...
http://www.bodyrecomposition.com/muscle-gain/whats-my-genetic-muscular-potential.html/

Also, his article on on general philosophies of muscle gain
http://www.bodyrecomposition.com/muscle-gain/general-philosophies-of-muscle-mass-gain.html/

Additional musings would be just from some information mentioned in some podcasts I remember (don't know links, but you can search for podcasts involving Dr. Mike Israetel & Armi Legge or Danny Lennon) where Dr. Mike discusses the rates of optimal weight gain and the proportion of muscle gained compared to fat. Unfortunately, the proportion of fat gained will always (unless you have medical assistance or some of the greatest genetics on the planet) outpace the proportion of muscle gained. Some figures of 1:2 (1lbs of muscle gained for every 2lbs of fat gained) for beginners, 1:3 for intermediates, and 1:4 for advanced lifters were mentioned for averages (you might do a little better or you might do a little worse...genetics has a lot to do with it). However, once you get past that bodyfat % sweetspot (see mentioning about this on Lyle's site as well) you become more insulin resistant, thus the proportion toward fat will increase even greater. Good news is, while muscle is slower and fat is faster to gain in a surplus, the inverse is true... In a deficit, fat is faster to go compared to the rate of muscle loss (and depending on training experience and nutrition*, the net result of muscle might be that you maintained or might have encountered a small increase), thus the general recommendation of bulk and cut cycles (there is some maintenance time in there too, so read the link).

My takeaway from this is, you can add weight too slow, just as you can add weight too fast. If you follow the general philosophies Lyle outlines, you are doing just about the best you can do in my opinion.

Lifting and eating at maintenance isn't harmful. You just won't gain muscle. My experience has been that you will lean out some but it's a very slow process.

"what is muscle gain then?"

It's a response to your training, you overload your muscle and over time you become stronger and then bigger.
Diet is permissive but it's the training that initiates the process.
Jumping to a calorie surplus may optimise the speed of growth but the downside may well be fat gain as well as muscle gain.

Have a serious think about your goals - weight, body composition, strength, size, physique.... then make some choices both for the short and long term.

You can aim for a recomp and then add calories if you find yourself leaner than expected...