Comet. I have found Comet to be most consistent in color and brightness. Comets were the only ones that worked in my Funhouse mirror. The mirror has 4 yellow bulbs. Comets are the only ones I tried that all 4 were the same color and brightness. The ones from Marco, CT and PL were too dissimilar for me.
My last order was for over 100 bulbs. One non ghost was not working. Contacted Comet. Got two bulbs in the mail no charge. Great customer service.