Great to see a digital version too! On your remark about the digital one, it just misses the character and playfulness in the line work that you add with pen. It's losing your style because the vector lines in illustrator/Photoshop are parametric in their digital nature (haha what play on words)
Break them up and vary the widths even on the same line, look at lines on paper Vs the digital one. Not a square or totally straight line in sight, they are also less continuous :-)
That's not easy with digital though, as the tools don't lend themselves to it easily.