user37241: I just bought an Arduino Uno (SMD version) from W11Stop and want to know whether there is any other difference between Arduino UNO DIP and Arduino UNO SMD besides knowing that the SMD version doesn't have a DIP chip which can be replaced?
I am just a beginner so please help me if I am wrong!

user4833: Actually, there are no different on the functionality. But you may can't go through some features, because the ATmega can be remove it manually without any special tools. One of the useful case as ArduinoISP for burning bootloader to another ATmega328p AVR.
For personal suggestion, you just needed one piece of PDIP/DIP version UNO, others boards you can consider the lower cost, such as Nano, Pro Mini(Without USB-to-TTL), UNO(SMD).
For the USB-to-TTL, there are many options in the market, watch this video to explain what are they different. 

user31105: As far as I know there is no real difference, at least not directly related to the SMD.
There are many clones which sometimes have slightly different behavior or protection.
But for the SMD the only disadvantage is it cannot (easily) be replaced.
I have one original one (with DIP) and several clones and so far I did not found any difference, except for having mini USB instead of normal USB.

37241: <p>I just bought an Arduino Uno (SMD version) from <a href="http://www.w11stop.com/" rel="nofollow noreferrer">W11Stop</a> and want to know whether there is any other difference between Arduino UNO DIP and Arduino UNO SMD besides knowing that the SMD version doesn't have a DIP chip which can be replaced?</p>

<p>I am just a beginner so please help me if I am wrong!</p>
 4833: <p>Actually, there are no different on the functionality. But you may can't go through some features, because the ATmega can be remove it manually without any special tools. One of the useful case as <a href="https://www.arduino.cc/en/Tutorial/ArduinoISP" rel="nofollow noreferrer">ArduinoISP</a> for burning bootloader to another ATmega328p AVR.</p>

<p>For personal suggestion, you just needed one piece of PDIP/DIP version UNO, others boards you can consider the lower cost, such as <a href="https://store.arduino.cc/usa/arduino-nano" rel="nofollow noreferrer">Nano</a>, <a href="https://store.arduino.cc/usa/arduino-pro-mini" rel="nofollow noreferrer">Pro Mini</a>(Without <a href="https://www.adafruit.com/product/954" rel="nofollow noreferrer">USB-to-TTL</a>), UNO(SMD).</p>

<p>For the USB-to-TTL, there are many options in the market, watch this <a href="https://www.youtube.com/watch?v=Vawhrr4COjI" rel="nofollow noreferrer">video</a> to explain what are they different. </p>
 31105: <p>As far as I know there is no real difference, at least not directly related to the SMD.</p>

<p>There are many clones which sometimes have slightly different behavior or protection.</p>

<p>But for the SMD the only disadvantage is it cannot (easily) be replaced.</p>

<p>I have one original one (with DIP) and several clones and so far I did not found any difference, except for having mini USB instead of normal USB.</p>
