If the shorts fit properly I'd say keep 'em. If you're like most of us you'll occasionally have days when the butt bones feels a bit bruised, like they're on the verge of a saddle sore. Keep the extra padded shorts for those days.

I have a pair of Pearl Izumi liner shorts for mountain bike baggies. The PI liner padding is thicker than I'd normally prefer, but I like 'em when my road bike is on the indoor trainer. I tend to sit more heavily in the saddle on the trainer because there are no bumps or chipseal to motivate me to support more of my weight on my legs and arms. So with thinner shorts I was getting some tenderness after long sessions on the indoor trainer. Now that I'm using the PI shorts with thicker padding, no more tenderness. Then I switch to my AeroTech Pro shorts with minimal padding for actual road rides.

That's the theory. Especially for folks with tender nipples or, like me, lots of moles that get rubbed raw.

I really like my Pearl Izumi Transfer sleeveless baselayer with their fancypants "minerale" fabric. It's slightly spongy, very soft and stretchy, yet fits fairly snugly. Best wicking fabric I've ever worn, winter or summer, even better than merino wool. I cannot make the stuff stink. I'm not kidding, I've worn it for two week straights, including sweaty rides indoors on the trainer or outdoors, and worn it to bed, taking it off only to shower. That fabric refuses to pick up any body odor. I've never seen anything like it before. Probably why it costs so much.

Recently Amazon notified me of a short sleeve PI Transfer baselayer in white for only $16. Seemed like a bargain so I clicked buy without reviewing it carefully. Unfortunately it turned out to be a completely different fabric. This is the new (as of spring 2018), Pursuit lineup. The short sleeve baselayer is a laminated fabric, with open mesh over an ultra-thin translucent smooth inner liner -- not the single layer woven material like the minerale fabric. It doesn't stretch and is form fitting, not merely snug -- it hurt like hell putting it on and taking it off, because I'm still recovering from shoulder injuries (I was hit by a car in May). It doesn't wick as effectively as the minerale fabric, and tended to feel soggy after a 40 minute indoor trainer session.

And it retained body odors immediately -- I had to wash it after one wearing. On the plus side any odor washed out easily with hand washing in gentle detergent for wool -- no special enzymes. And it dried very quickly hanging on my shower curtain rod.

But for only $16 I'll keep it, or maybe give it to a friend who's a little smaller and could probably use it.

tl;dr version -- Look for an older style Pearl Izumi Transfer base layer with the "minerale" fabric. Very important. Don't bother with any other base layer fabric. It'll cost around $30 discounted and worth every penny. Occasionally Nashbar has 'em.